Mini duplex connector with push-pull polarity mechanism and carrier using rail receiving portions

ABSTRACT

A new fiber optic connector provides a smaller form factor by including two ferrule assemblies in a housing. The housing accepts a push-pull mechanism that allows for insertion and removal from a carrier as well as an adapter. The push-pull mechanism may also include a flexure member to return the push-pull mechanism. Polarity of the fiber optic connector may also be selected by use of the push-pull mechanism.

This application claims priority to U.S. Provisional Patent ApplicationSer. No. 62/607,555, filed on Dec. 19, 2017 and Provisional PatentApplication Ser. No. 62/634,271, filed on Feb. 23, 2018, and under 35U.S.C. § 120 to U.S. Pat. No. 11,016,250, issued on Mar. 25, 2021, thecontents of all of which are incorporated by reference.

BACKGROUND OF THE INVENTION Field of the Invention

In the small form-factor pluggable (SFP and QSFP) industry, there are anumber of different ferrules and designs that are used. In someapplications, an MT ferrule is used, while in others it is the LC formthat is used. The LC connector uses a single optical fiber and fiberoptic ferrule per housing. In higher density applications, the LCconnector may not be used because the space that each of the LCconnectors use. Thus, it would beneficial to reduce the footprint of theLC connector by reducing the pitch between the fiber optic ferrules.

Applicant has a new design for a fiber optic connector using the LCfiber optic ferrule to reduce the overall footprint of the fiber opticconnector. In addition, an insertion/removal tool has been included toallow for the reduced footprint, allowing a user to more easily insertand remove the new fiber optic connectors. The fiber optic connector andthe insertion/removal tool may also provide a way to ensure the correctpolarity of the fiber optic connector and to even change the polarity inthe field.

Finally, the insertion/removal tool may include a way for it to beself-returning after a user inserts/removes the fiber optic connector.

SUMMARY OF THE INVENTION

The present invention is directed to a fiber optic connector thatincludes a housing having a main body extending between a front end anda rear end and having an opening extending therebetween, two ferruleassemblies disposed within the opening of the housing, each of theferrule assemblies including a fiber optic ferrule, a ferrule holder anda lead-in tube, the fiber optic ferrule being inserted into a front endof a ferrule holder and extending away from the front end of the ferruleholder, and the lead-in tube attached the ferrule holder and extendingrearwardly and away from the fiber optic ferrule, two springs, eachspring engaging a rearward facing surface of a respective ferrule holderand extending towards the rear end of the housing, and a spring pushengaging a rear portion of each of the two springs to bias the ferruleassemblies toward the front end of the housing, the spring push engaginga portion of the housing in the opening to retain the spring push withinthe opening, wherein each of the lead-in tubes extend through at least aportion of a respective spring and beyond a rear end of the spring push.

In some embodiments, the fiber optic connector includes a crimp bodyhaving a transition portion to receive an optical fiber extending fromeach of the lead-in tubes between the front end and a singular openingat a rear end, the rear end having an outer surface to receive a crimpband therearound.

In some embodiments, the housing has a rail receiving portion configuredto receive a latch component.

In some embodiments, the latch component is a push-pull mechanism.

In another aspect, the invention is directed to a method of assembling afiber optic connector that includes the steps of inserting into ahousing having a main body, the main body extending between a front endand a rear end and having an opening extending therebetween two ferruleassemblies, each of the ferrule assemblies comprising a fiber opticferrule, a ferrule holder and a lead-in tube, the fiber optic ferrulebeing inserted into a front end of a ferrule holder and extending awayfrom the front end of the ferrule holder, and the lead-in tube attachedthe ferrule holder and extending rearwardly and away from the fiberoptic ferrule, inserting on to each of the ferrule assemblies a springengaging a rearward facing surface of the ferrule holder and extendingtowards the rear end of the housing, inserting into the housing a springpush to engage a rear portion of each of the springs to bias the ferruleassemblies toward the front end of the housing, the spring push engaginga portion of the housing in the opening to retain the spring push withinthe opening, inserting an adhesive into each of the lead-in tubes tosecure an optical fiber within each of the ferrule assembly, andallowing the adhesive to cure with an optical fiber within each of theferrule assemblies.

Additional features and advantages of the invention will be set forth inthe detailed description which follows, and in part will be readilyapparent to those skilled in the art from that description or recognizedby practicing the invention as described herein, including the detaileddescription which follows, the claims, as well as the appended drawings.

It is to be understood that both the foregoing general description andthe following detailed description of the present embodiments of theinvention, and are intended to provide an overview or framework forunderstanding the nature and character of the invention as it isclaimed. The accompanying drawings are included to provide a furtherunderstanding of the invention, and are incorporated into and constitutea part of this specification. The drawings illustrate variousembodiments of the invention, and together with the description serve toexplain the principles and operations of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side elevational view of one embodiment of a fiber opticconnector with a push-pull mechanism, crimp body, and boot according tothe present invention;

FIG. 2 is an exploded perspective view of the fiber optic connector inFIG. 1;

FIG. 3 is a perspective view of a portion of the fiber optic connectorin FIG. 1, which includes the housing with two ferrule assemblies and aspring push;

FIG. 3A is an exploded perspective view of the ferrule assembly andspring in FIG. 3;

FIG. 4 is a partial cross section of the housing with two assembledferrule assemblies and the spring push in FIG. 3;

FIG. 5 is a perspective view of the housing of the fiber optic connectorin FIG. 1 and FIG. 3;

FIG. 6 is a rear elevational view of the housing in FIG. 5;

FIG. 7 is a perspective view of spring push in FIG. 3;

FIG. 8 is a front elevational view of the crimp body in FIG. 1;

FIG. 9 is a partial cut away perspective view of the crimp body in FIG.8;

FIG. 10 is a perspective view of the push-pull mechanism of FIG. 1;

FIG. 10A is a perspective view of the underside of the push-pullmechanism of FIG. 10;

FIG. 11 is a perspective view of a latch body used with the push-pullmechanism in FIG. 10;

FIG. 12 is a front elevational view of the latch body in FIG. 11;

FIG. 13 is a side elevational view of the latch body in FIG. 11;

FIG. 14 is a perspective view of the push-pull mechanism and latch bodyillustrating how the latch body attaches to the push-pull mechanism;

FIG. 15 is a partial, perspective view of the push-pull mechanism andlatch body in FIG. 14;

FIG. 16 is a top view of the push-pull mechanism in FIG. 14 attached tothe fiber optic connector in FIG. 1;

FIG. 17 is an enlarged view of the connection of the push-pull mechanismand housing in FIG. 16;

FIG. 18 is a front perspective view of a plurality of fiber opticconnectors and push-pull mechanisms mounted in a carrier according toone embodiment of the present invention;

FIG. 19 is a front view of the plurality of fiber optic connectors andpush-pull mechanisms mounted in the carrier in FIG. 18;

FIG. 20 is a rear perspective view of the plurality of fiber opticconnectors and push-pull mechanisms mounted in the carrier in FIG. 18 inpreparation to be inserted into one embodiment of a fiber opticconnector adapter according to the present invention;

FIG. 21 is a cross section of the assembly of the push-pull mechanismand latch body and the fiber optic connector, all mounted in the carrierand inserted into the adapter;

FIG. 22 is a cross section of a smaller portion of the assembly shown inFIG. 21 illustrating push-pull mechanism and latch body mounted in thecarrier and the fiber optic connector adapter;

FIG. 23 is an elevational view of a second embodiment of a fiber opticconnector with a push-pull mechanism, crimp body, and boot according tothe present invention;

FIG. 24 is a partial cross sectional view of the housing with the twoferrule assemblies and a spring push of the fiber optic connector inFIG. 23;

FIG. 25 is a perspective view of the housing of the fiber opticconnector in FIG. 23;

FIG. 26 is a rear elevational view of the housing in FIG. 25;

FIG. 27 is partial cross section of a second embodiment of a crimp bodyaccording to the present invention and shown in FIG. 23;

FIG. 28 is a perspective view of the second embodiment of a push-pullmechanism according to the present invention and shown in FIG. 23;

FIG. 29 is a cross section view of the push-pull mechanism in FIG. 27;

FIG. 30 is cross section of the fiber optic connector with a push-pullmechanism and crimp body of FIG. 23;

FIG. 31 is a perspective view of a fiber optic connector and push-pullmechanisms of FIG. 23 mounted in a carrier;

FIG. 32 is a cross section view of the carrier of FIG. 30 without thefiber optic connector;

FIG. 33 is a cross section view of the fiber optic connector with apush-pull mechanism and crimp body of FIG. 23 in an embodiment of acarrier;

FIG. 34 is a cross section view of fiber optic connector with apush-pull mechanism and crimp body in a carrier being inserted into anadapter;

FIG. 35 a cross section view of fiber optic connector with a push-pullmechanism and crimp body in a carrier being removed from the adapter;

FIG. 36 is a cross section view of fiber optic connector with apush-pull mechanism and crimp body being removed from a carrier;

FIG. 37 is a perspective view of a second embodiment of a spring pushaccording to the present invention;

FIG. 38 is a perspective view of a second embodiment of a crimp bodyaccording to the present invention;

FIG. 39 is an elevational view of another embodiment of a fiber opticconnector with a push-pull mechanism, crimp body, and boot according tothe present invention;

FIG. 40 is a right top perspective view of the push-pull mechanism ofFIG. 39;

FIG. 41 is a bottom perspective view of the push-pull mechanism of FIG.39;

FIG. 42 is a right perspective view of the latch body with a flexuremechanism of FIG. 39;

FIG. 43 is a right bottom perspective view of the latch body and flexuremechanism of FIG. 39

FIG. 44 is a right perspective view of the push-pull mechanism withlatch body and flexure mechanism;

FIG. 45 is an enlarged cross sectional view of a portion of thepush-pull mechanism, latch body, and fiber optic connector of FIG. 39;

FIG. 46 is enlarged cross sectional view of a portion of the push-pullmechanism, latch body, and fiber optic connector of FIG. 41 at adifferent location from FIG. 47;

FIG. 47 is a cross sectional view of the push-pull mechanism, latchbody, and housing; and

FIG. 48 is a top perspective view of the push-pull mechanism, latchbody, and housing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Reference will now be made in detail to the present preferredembodiment(s) of the invention, examples of which are illustrated in theaccompanying drawings. Whenever possible, the same reference numeralswill be used throughout the drawings to refer to the same or like parts.

Applicant notes that the term “front” or “forward” means that directionwhere the fiber optic connector would meet with another fiber opticconnector or device, while the term “rear” or “rearward” is used to meanthe direction from which the optical fibers enter into the fiber-opticferrule or fiber optic connector. Thus, “front” is that part of thehousing 102 on the left side of FIG. 1 and “forward” is out and to theleft. “Rear” is that part of the housing 102 that is on the right sideof the page and “rearward” is toward the right.

One embodiment of a fiber optic connector 100 according to the presentinvention is illustrated in FIGS. 1-22. The fiber optic connector 100,in FIGS. 1 and 2, may include a housing 102, a latch component(push-pull mechanism) 104, a crimp body 106, a crimp ring and heatshrink tube 108, and a strain relief boot 110. As discussed in moredetail below, the housing 102 and its components, the latch component104, and the crimp body 106 are the focus of this application. The crimpring and heat shrink tube 108 and a strain relief boot 110 are generallyknown components.

Turning to FIGS. 3 and 3A, inside the housing 102 are two ferruleassemblies 120, two springs 122, and a spring push 124. The two ferruleassemblies 120 each include a fiber optic ferrule 130 (generally a 1.25mm LC fiber optic ferrule), a ferrule holder 132, and a lead-in tube134. The spring 122 is added later. The ferrule assemblies 120 arepreferably preassembled and are inserted into the housing 102 withoutneeding any further processing.

The housing 102 has a main body 140 extending between a front end 142and a rear end 144, and has an opening 146 extending therebetween. Theopening 146 of the housing 102 may also have structures 148 that orientand retain the ferrule assemblies 120 in the housing 102. In this case,there are flat surfaces 150 that engage corresponding flat surfaces 152on the ferrule holder 132, to keep the ferrule assemblies 120 fromrotating within the housing 102.

Once the ferrule assemblies 120 are disposed within the housing 102, thesprings 122 are placed around the lead-in tube 134 and against a backend 138 of the ferrule holder 132. The spring push 124 is then insertedinto the opening 146 of the housing 102. The spring push 124 has a pairof latches 154 that engage corresponding openings 156 in the oppositesides of the main body 140 of the housing 102 to retain the spring push124 in the opening 146. The spring push 124 has a forward facing surface158 to engage the rear ends of the springs 122. The forward facingsurface 158 generally corresponds to the two springs 122 to ensure thatthat the spring push 124 stays engaged with the springs 122. Thisconfiguration biases the ferrule assemblies 120 toward the front end 142of the housing 102. While not shown, two optical fibers enter into theferrule assemblies 120 through the spring push 124 and into the lead-intubes 134.

The lead-in tubes 134 are connected to and extend from the ferruleholder 132. Preferably, the lead-in tubes 134 are secured to the ferruleholder 132, e.g. by adhesives, press-fit. The lead-in tubes 134 alsoextend beyond the rear end of the ferrule holder 132. See FIG. 4. Thisallows for injection of epoxy or other adhesives into the ferruleassemblies 120 through the lead-in tubes 134 to secure the opticalfibers therein. With the lead-in tubes 134 extending so far rearwardly,there is no concern that the epoxy or adhesives will interfere with thesprings 134, the spring push 124, or other structures in the fiber opticconnector 100. Typically, the adhesive is cured with the lead-in tubes134 exposed in prior to adding any additional components.

The housing 102 may also have an indicia 136 of the polarity of thefiber optic connector 100. See FIG. 5. Depending on the application, oneof the ferrule assemblies 120 may be a receiving or a transmitting sidewith the other of the ferrule assemblies 120 being the other. It isimportant for the user or technician to know which of the ferruleassemblies 120 is which. The indicia 136, an indentation in this case,makes the orientation or the polarity of the fiber optic connector 100clearly visible. Other types of indicia may be used and still fallwithin the scope of the present invention.

The outside of the housing 102 has many features that are integral toits use. See FIGS. 5 and 6. First are the top surface 160 and the bottomsurface 162. The top and bottom surfaces 160,162 are preferably thesame, with the exception of the indicia 136, as one of the two surfaces160,162 would not have it. Extending from the rear end 144 towards thefront 142 of the housing 140 on both the top surface 160 and the bottomsurface 162 is a rail receiving portion 164. As will be discussed inmore detail below, the rail receiving portion 164 will stop just beforethe front end 142 as it will therefore create a stop surface 166. Thelatch component (push-pull mechanism) 104 will make use of the stopsurface 166 to insert the fiber optic connector 100 into variousstructures.

The rail receiving portion 164 has a central portion 168 and then twolobe sections 170, one lobe on each side of the central portion 168. Asbest seen in FIG. 6, the rail receiving portion 164 looks like part of aprofile of a dog bone. This configuration matches that of the bottomsurface of the latch component (push-pull mechanism) 104 to form asliding dove-tail configuration. Other configurations are possible, suchas, for example, the second version illustrated below—a cap withundercuts (essentially an umbrella or a T-shape configuration). See FIG.26.

The next feature of the housing 102 and main body 140 are the two sidesurfaces 180. The two side surfaces 180 are those opposite to oneanother and separated by the top surface 160 and the bottom surface 162.Referring to FIG. 6 in particular, each of the sides 180 are dividedinto three portions. The first portion is a longitudinal central portion182 extending in a first plane A. The second portion is a longitudinaltop portion 184 extending in a second plane B, the first plane A isparallel to and offset from the second plane B. The third portion is alongitudinal bottom portion 186 extending in the second plane B. Thelongitudinal top portion 184 preferably is divided from the longitudinalcentral portion 182 by a shoulder 188. The shoulder 188 preferably has asurface that is in plane C and is perpendicular to both planes A and B.Similarly, the longitudinal bottom portion 186 preferably is dividedfrom the longitudinal central portion 182 by a shoulder 190. Theshoulder 190 preferably has a surface that is in plane D and isperpendicular to both planes A and B.

The two longitudinal top portions 184 and the two longitudinal bottomportions 186 function to align the fiber optic connector 100 in ahorizontal direction in various structures, e.g., a carrier and anadapter. On the other hand, it is the shoulders 188,190 that align thefiber optic connector 100 in a vertical direction. These will bediscussed in more detail below. See also FIGS. 19 and 20.

Referring to FIG. 5, there are also two indentations 192 in thelongitudinal top portion 184 on both sides of the main body and adjacentthe rear end 144. The indentations 192 form a forward facing surfaces194 that are used by two housing latches in the latch component(push-pull mechanism) 104. As described more later, the latch component(push-pull mechanism) 104 engages the forward facing surfaces 194 whenremoving the fiber optic connector 100.

Returning to the crimp body 106, it is illustrated in FIG. 1 and also inFIGS. 8 and 9. The crimp body 106 has a front portion 200 that isdesigned to interact and connect with the spring push 124 and also isdisposed within the opening 146 of the housing 102 when installed. Thecrimp body 106 has a rear portion 202 that extends behind the housing102 and provides an outer surface 204 to receive a crimp band (e.g.,crimp ring and heat shrink tube 108) therearound. Extending from a frontend 206 to the rear end 208 is an opening 210. The opening 210 at thefront portion 200 receives at least a portion of each of the lead-intubes 134. The spring push 124 has two tabs 212 on opposites sidesthereof and extend in a rear ward direction in the opening 210 to engagean opening 214 in side walls 216 of the crimp body 106. The front end206 also has a forward facing surface 218 that complements the rear ofthe spring push and, together with the tabs 212 keeps the crimp body 106securely fixed to fiber optic connector 100. Although the crimp body 106is illustrated as being attached to the spring push 124, alternativelythe crimp body 106 could be attached to the housing 102.

The opening 210 in the crimp body 106 rearwardly of the lead-in tubesprovides a transition portion 220 for the optical fibers that aresecured in the fiber optic ferrules 130. Since the crimp body 106 has asingular opening 222 at the rear end thereof, the optical fibers need tobe able to exit that singular opening 222 in a smooth fashion so theyare not bent beyond their bend radius, thereby damaging or breaking theoptical fibers. The transition portion 220 provides for this function.

The crimp body 106 also has a top surface 230 and the bottom surface232. The top surface 230 and the bottom surface 232 may be configuredwith a central portion 234 that is similar to the central portion 168 ofthe rail receiving portion 164 above. However, the crimp body 106 hastwo outer trough portions 236 that are open to the space above the crimpbody 106. The central portion 234 and the two outer trough portions 236function as an alignment feature of the rail receiving portion 164. Asdiscussed more below, the latch component (push-pull mechanism) 104 canbe better aligned with the rail receiving portion 164 by using thecentral portion 234 and the two outer trough portions 236 on the crimpbody 106.

While the crimp body 106 is illustrated as a single, unitary body (i.e.,molded at one time with one material), it could also be molded as twopieces and then later the two pieces secured to one another.

The latch component (push-pull mechanism) 104 is illustrated in moredetail in FIGS. 10-17. The latch component (push-pull mechanism) 104 hasa main body 250 and a latch body 252 that attaches to the main body 250.See FIGS. 10 and 11-13. The main body 250 has a front portion 254, amiddle portion 256, and a rear portion 258. Generally, the front portion254 is where the latch body 252 attaches to the main body 250 andprovides for the latching of the fiber optic connector 100 to theadapter and carrier. The middle portion 256 provides for latching oflatch component (push-pull mechanism) 104 to the housing 102. The rearportion 258 has a grasping portion 260 to allow a user to push and pullthe latch component (push-pull mechanism) 104 to engage and disengagethe fiber optic connector 100 and the latch component (push-pullmechanism) 104 from the adapter and/or carrier.

The front portion 254 is divided into a first front portion 262 and asecond front portion 264. The first front portion 262 and the secondfront portion 264 both have a window 266, 268, respectively to receive alatch from the latch body 252 therethrough. An underside of the firstportion 262 has a groove 270 on either side to receive attachmentmembers 272, 274 from the latch body 252 (see FIGS. 10A and 11) tosecure the latch body 252 to the main body 250. The attachment members272, 274 (and thus the latch body 252) are able to slide within thegrooves 270 to allow for the latching and unlatching the fiber opticconnector 100. The grooves 270 should extend the length of the firstportion 254.

The second front portion 264 has an upper surface 276 that is higherthan an upper surface 278 of the first front portion 262. This allowsfor the latching of a carrier and an adapter with the same device, asnoted in more detail below. On the bottom side 280 of the second frontportion 264 is a rail portion 282 that includes two extensions 284, 286that are joined by a central portion 288, all having a complementaryconfiguration of the rail receiving portion 164 of the housing 102. SeeFIG. 10A. The latch body 252 also has the same rail portionconfiguration (central portion 290 and two extensions 292, 294) on thebottom thereof. This allows the main body 250 and the latch body 252 tobe slidingly attached to the rail receiving portion 164 of housing 102.When the latch body 252 is inserted into the first front portion 262, afront surface 296 of the rail portion 282 provides a pushing surface bywhich the main body 250 can push the latch body 252 in the railreceiving portion 164 of the housing 102. See also FIG. 21. The frontsurface 300 of the latch body 252 also provides a pushing surface to beused against the stop surface 166 of the housing 102. This allows forthe user to exert a force on the latch component (push-pull mechanism)104 which is transferred through the main body 250 to the latch body 252and to the housing 102 to insert the fiber optic connector 100 into acarrier and/or adapter.

Returning to FIGS. 11-13, the latch body 252 has two latches, an adapterlatch 310 and a carrier latch 312. The latch body may only have one ofthe latches, depending upon its uses and the needs of the user. Theadapter latch 310 extends from a forward portion of the latch body 252and protrudes through window 266 of the main body 250. The carrier latch312 also extends from the latch body 252, from a rear portion thereof,and protrudes through the window 268 of the main body 250. As isrecognized from FIG. 13, the adapter latch 310 does not rise as high asthe carrier latch 312 (plane E versus plane F) so that when the fiberoptic connector 100 is inserted into or removed from a carrier, theadapter latch 310 will not engage the carrier.

Each of the latches, adapter latch 310 and a carrier latch 312, eachhave a proximal end 314, 316, to engage an adapter and a carrier,respectively. Each of the proximal ends, 314, 316, have a rearwardfacing surface 314 a, 316 a and an upward facing surface, 314 b,316 b.The proximal ends 314, 316 will engage an opening in an adapter or acarrier. See, e.g., FIG. 21.

The latch component (push-pull mechanism) 104 is removably connected tothe rail receiving portion 164 of the housing 102 as described above.However, the connections so far described do not prevent the latchcomponent (push-pull mechanism) 104 from being removed toward the rearof the housing 102 when, for example, the grasping portion 260 is pulledrearwardly. However, in the middle portion 256, there are two latches320 that extend from the latch component (push-pull mechanism) 104inward and will move along rear portions of the longitudinal topportions 184 on each side of the housing 102. See FIGS. 1, 18, and 20.In particular, the housing 102 has indentations 192 for the latches 320and will engage the forward facing surfaces 194 when the latch component(push-pull mechanism) 104 is pulled rearwardly. This will allow for theuser to remove the fiber optic connector 100 from a carrier and/oradapter as will now be described. It should be noted that the latches320 are cantilevered latches and thus pushing on area 322 (see FIGS. 16and 17) will cause the latches to move away from the housing 102, andwill release the housing 102 from the latch component (push-pullmechanism) 104.

Turning to FIGS. 1, 14, 15, and 18, the latch component (push-pullmechanism) 104 is connected to the fiber optic connector 100. The fiberoptic connector 100 can be inserted into a carrier 350 (FIG. 18) and/oran adapter 400 (FIG. 20). The carrier 350 provides the user with aconvenient way to insert into and remove 4 fiber optic connectors 100(could also have more or fewer connectors, but usually in groups of two)from an adapter (or other telecommunications structure) rather than oneat a time. It provides a cost savings time wise and also assists inpreventing the stubbing of or breaking fiber optic connectors.

The carrier 350 has a few features that enable the use of the carrier350 to correctly orient the fiber optic connectors 100 (polarity) andalso to align the fiber optic connectors 100 to one another forinsertion into the adapter. The carrier 350 has a top 352 and a bottom354 and the top 352 has a cut out 356 for each of the fiber opticconnectors 100, or the latch component (push-pull mechanism) 104. If thefiber optic connector 100 is inserted into the carrier 350 incorrectly(wrong polarity) then the fiber optic connector 100 will not seat in thecarrier 350 correctly. The cut out 356 also has a rearward facingsurface 358 that is used to remove all of the fiber optic connectors 100from an adapter as discussed in more detail below.

The carrier 350 has an opening 360 extending between the front end 362and the rear end 364. Inside the opening 360 are projections toaccurately orient the fiber optic connectors 100 in the carrier 350.Extending from the top 352 into the opening 360 are the top extensions366 a. Along the corner of the top and the sides of the carrier 350 arepartial top extensions 366 b, which perform the same function as topextensions 366 a. Similarly, there are bottom extensions 368 a andpartial bottom extensions 368 b. As best seen in FIG. 19, the topextensions 366 a are longer and extend down into the opening 360 fartherthan the bottom extensions 368 a extend upward into the opening 360. Thedistance between corresponding top and bottom extensions 366 a, 368 aprovide the vertical alignment of the fiber optic connector 100 withinthe carrier 350. Referring back to FIG. 6, the shoulders 188 and 190and, more particularly, the distance between them and their verticallocation along the sides 180 of the housing 102 orients the fiber opticconnectors 100 vertically within the carrier 350. As can be gleamed fromFIG. 19, if one of the fiber optic connectors 100 is orientedincorrectly, the longitudinal top portions 184 and the two longitudinalbottom portions 186 will be in the incorrect location and the latchcomponent (push-pull mechanism) 104 will hit the carrier and prevent thefiber optic connector 100 from being fully inserted.

The horizontal alignment of the fiber optic connectors 100 is alsocontrolled by the top extensions 366 a and the bottom extensions 370.However, it is the longitudinal top portions 184 and the twolongitudinal bottom portions 186 (the distance therebetween) engagingthe top extensions 366 a and the bottom extensions 370 that controls.FIG. 19 also shows that there is very limited space between the fiberoptic connectors 100 and allows for a higher density of fiber opticconnectors 100.

Once the fiber optic connectors 100 with the latch component (push-pullmechanism) 104 are correctly inserted into the carrier 350, a latch stop380 on the latch component (push-pull mechanism) 104 will engage therearward facing surface 358 of the carrier 350. The carrier 350 iscaptured between the latch stop 380 and rearward facing surface 316 a ofcarrier latch 312. This will expose enough of the latch component(push-pull mechanism) 104 and, in particular, the first front portion262. At the same time, the top 352 of the carrier 350 has windows 370 toreceive the carrier latch 312 from each latch body 252, and inparticular the proximal end 316. See FIGS. 21 and 22. However, as thefiber optic connector 100 passes into the and through carrier 350, theadapter latch 310 is too short to engage the carrier 350.

With the carrier latch 312 now in the window 370 and engaging surface372 created by the window 370, the carrier 350 or the latch component(push-pull mechanism) 104 can be used to insert the fiber opticconnectors 100 into the adapter 400. As clear from FIGS. 21 and 22, ifthe carrier 350 is used to insert the ganged fiber optic connectors 100(in the carrier 350 in FIG. 20), then the carrier 350 will push on thecarrier latch 312, which is on the latch body 252 and has front surface300 of the latch body 252, which then pushes against the stop surface166 of the housing 102 to secure the ganged fiber optic connectors 100.Thus, all of the fiber optic connectors 100 will be pushedsimultaneously into the adapter. On the other hand, one could also usedthe latch component (push-pull mechanism) 104 to insert them as well.

As the ganged fiber optic connectors 100 are inserted into the adapter400, each of the adapter latches 310 will pop up into a respectivewindow 402. With the adapter latch 310 now in the window 402 andengaging surface 404 created by the window 402, the ganged fiber opticconnectors 100 are secured within the adapter 400. The adapter 400 hasthe same projections to accurately orient the fiber optic connectors 100in the adapter 400. Thus, applicant will not repeat the same structureshere.

The fiber optic connectors 100 can be removed from the adapter 400 oneat a time or all at the same time with the carrier 350. To remove onefiber optic connector 100 from the adapter 400 (if only in the adapter)or the adapter 400 and the carrier 350, one only need to pull on thegrasping portion 260 of the latch component (push-pull mechanism) 104.As the latch component (push-pull mechanism) 104 is pulled backward, itmoves rearward relative to the latch body 252 (because the adapter latch310 and the carrier latch 312 are against the engaging surfaces 372,404, respectively) and the portions forward of the windows 266, 268,will move over the adapter latch 310 and a carrier latch 312, pushingthem down and out of the windows 370, 402. Continued pulling on thegrasping portion 260 of the latch component (push-pull mechanism) 104causes the latches 320 to engage the forward facing surfaces 194 of thehousing 102 and the whole fiber optic connector can be removed.

If the ganged fiber optic connectors 100 are to be removed together andonly from the adapter 400, then the user will pull on the carrier 350(while the adapter 400 remains fixed relative thereto). The carrier 350and, in particular, the rearward facing surface 358 will engage latchstop 380 on the latch component (push-pull mechanism) 104 of each of thefiber optic connectors 100. As noted above, the portions forward of thewindows 266, 268, will move over the adapter latch 310 (and carrierlatch 312, but the carrier 350 will retain the fiber optic connectors100), pushing them down and out of the windows 370, 402. Continuedpulling on the carrier causes the latches 320 to engage the forwardfacing surfaces 194 of the housing 102 and all of the ganged fiber opticconnectors 100 can be removed from the adapter 400. The fiber opticconnector 100 can be inserted into and removed the same adapter 400without a carrier 350 present. A partially populated carrier in theadapter can how a single fiber optic connectors removed for install,while the carrier will stay connected to the fiber optic connectors thatremain in the adapter. When the last fiber-optic connector is removed isfrom the adapter, it will bring the carrier with it.

A second embodiment of a fiber optic connector 1100 according to thepresent invention is illustrated in FIGS. 23-36. The fiber opticconnector 1100, in FIG. 23, may include a housing 1102, a latchcomponent (push-pull mechanism) 1104, and a crimp body 1106. Asdiscussed in more detail below, the housing 1102 and its components, thelatch component 1104, and the crimp body 1106 are the focus here. It isalso preferred that there by a crimp ring and heat shrink tube and astrain relief boot as with the prior embodiment, but since the crimpring and heat shrink tube and a strain relief boot are generally knowncomponents, they are omitted here for clarity.

Turning to FIG. 24, inside the housing 1102 are two ferrule assemblies1120 (which may be the same as ferrule assemblies 120), two springs1122, and a spring push 1124. The two ferrule assemblies 1120 eachinclude a fiber optic ferrule 1130 (generally a 1.25 mm LC fiber opticferrule), a ferrule holder 1132, and a lead-in tube 1134. The spring1122 is added later. The ferrule assemblies 1120 are preferablypreassembled and are inserted into the housing 1102 without needing anyfurther processing.

The housing 1102 has a main body 1140 extending between a front end 1142and a rear end 1144, and has an opening 1146 extending therebetween. Theopening 1146 of the housing 1102 may also have structures 1148 thatorient and retain the ferrule assemblies 1120 in the housing 1102. Inthis case, there are flat surfaces 1150 that engage corresponding flatsurfaces 1152 on the ferrule holder 1132, to keep the ferrule assemblies1120 from rotating within the housing 1102.

Once the ferrule assemblies 1120 are disposed within the housing 1102,the springs 1122 are placed around the lead-in tube 1134 and against aback end 1138 of the ferrule holder 1132. The spring push 1124 is theninserted into the opening 1146 of the housing 1102. The spring push 1124has a pair of latches 1154 that engage corresponding openings 1156 inthe opposite sides of the main body 1140 of the housing 1102 to retainthe spring push 1124 in the opening 1146. The spring push 1124 has aforward facing surface 1158 to engage the rear ends of the springs 1122.The forward facing surface 1158 generally corresponds to the two springs1122 to ensure that that the spring push 1124 stays engaged with thesprings 1122. This configuration biases the ferrule assemblies 1120toward the front end 1142 of the housing 1102. While not shown, twooptical fibers enter into the ferrule assemblies 1120 through the springpush 1124 and into the lead-in tubes 1124.

The lead-in tubes 1134 are connected to and extend from the ferruleholder 1132. Preferably, the lead-in tubes 1134 are secured to theferrule holder 1132, e.g. by adhesives, press-fit. The lead-in tubes1134 also extend beyond the rear end of the ferrule holder 132 and thesprings 1122 and the spring push 1124. See FIG. 24. This allows forinjection of epoxy or other adhesives into the ferrule assemblies 1120through the lead-in tubes 1134 to secure the optical fibers therein.With the lead-in tubes 1134 extending so far rearwardly, there is noconcern that the epoxy or adhesives will interfere with the springs1122, the spring push 1124, or other structures in the fiber opticconnector 1100.

The housing 1102 may also have an indicia of the polarity of the fiberoptic connector 1100 as with the prior embodiment. Similarly, anindentation or other mark may be present on the housing 1102.

The outside of the housing 1102 has many features that are integral toits use. See FIGS. 25 and 26. First are the top surface 1160 and thebottom surface 1162. The top and bottom surfaces 1160,1162 arepreferably the same, but may have some differences and still fall withinthe scope of the present invention. Extending from the rear end 1144towards the front 1142 of the housing 11020 on both the top surface 1160and the bottom surface 1162 is a rail receiving portion 1164. As will bediscussed in more detail below, the rail receiving portion 1164 willstop before the front end 1142 as it will therefore create a stopsurface 1166. The latch component (push-pull mechanism) 1104 will makeuse of the stop surface 1166 to insert the fiber optic connector 1100into various structures.

The rail receiving portion 1164 has a central portion 1168 and two lobesections 1170, one lobe on each side of the central portion 1168. Asbest seen in FIG. 26, the rail receiving portion 1164 has a T-shapeconfiguration. This configuration matches that of the bottom surface ofthe latch component (push-pull mechanism) 1104 to form a slidingconfiguration. Other configurations are possible, as noted above.

The next feature of the housing 1102 and main body 1140 are the two sidesurfaces 1180. The two side surfaces 1180 are those opposite to oneanother and separated by the top surface 1160 and the bottom surface1162. Referring to FIG. 26 in particular, each of the sides 1180 aredivided into at least three portions. The first portion is alongitudinal central portion 1182 extending in a first plane G. Thesecond portion is a longitudinal top portion 1184 extending in a secondplane H, the first plane G is parallel to and offset from the secondplane H. The third portion is a longitudinal bottom portion 1186extending in the second plane H. The longitudinal top portion 1184preferably is divided from the longitudinal central portion 1182 by ashoulder 1188. The shoulder 1188 preferably has a surface that is inplane I and is perpendicular to both planes G and H. Similarly, thelongitudinal bottom portion 1186 preferably is divided from thelongitudinal central portion 1182 by a shoulder 1190. The shoulder 1190preferably has a surface that is in plane J and is perpendicular to bothplanes G and H. There is also an inclined wall 1196 between the bottomof the central portion 1168 and the shoulder 1188. A portion of thelatch component (push-pull mechanism) 1104 uses this inclined wall 1196as a reference surface while moving along the housing 1102. See FIG. 26.The inclined wall 1196 ends at the stop surface 1166, where the latchcomponent (push-pull mechanism) 1104 engages the stop surface 1166 tomove the fiber optic connector 1100 as discussed below.

The two longitudinal top portions 1184 and the two longitudinal bottomportions 1186 function to align the fiber optic connector 1100 in ahorizontal direction in various structures, e.g., a carrier and anadapter. On the other hand, it is the shoulders 1188,1190 that align thefiber optic connector 1100 in a vertical direction as was discussed indetail above. As such, this discussion is not included here.

Also on the top surface 1160 and the bottom surface 1162 is a latch 1172with an engagement surface 1174 and a release ramp 1176. The latch 1172is a cantilevered latch that works with the latch component (push-pullmechanism) 1104 to engage and disengage from an adapter. Finally, on thetop surface 1160 and the bottom surface 1162 is an opening 1192 in therail receiving portion 1164 for an extension from the latch component(push-pull mechanism) 1104. As described in more detail below, theextension from the latch component (push-pull mechanism) 1104 engages aforward facing surface 1194 to remove the fiber optic connector 1100from the adapter and or carrier. See FIG. 24.

The crimp body 1106 has a front portion 1200 that is designed tointeract and connect with the spring push 1124 and also is disposedwithin the opening 1146 of the housing 1102 when installed, which isusually after the epoxy used to secure the optical fibers in theferrules 1130 has cured. The crimp body 1106 has a rear portion 1202that extends behind the housing 1102 and provides an outer surface 1204to receive a crimp band (e.g., crimp ring and heat shrink tube)therearound. Extending from a front end 1206 to the rear end 1208 is anopening 1210. The opening 1210 at the front portion 1200 receives atleast a portion of each of the lead-in tubes 1134. The spring push 1124has two tabs 1212 (FIG. 24) on opposites sides thereof and extend in arearward direction in the opening 1210 to engage an opening 1214 in sidewalls 1216 of the crimp body 1106. The front end 1206 also has a forwardfacing surface 1218 that complements the rear of the spring push 1124and, together with the tabs 1212, keeps the crimp body 1106 securelyfixed to fiber optic connector 1100.

The opening 1210 in the crimp body 1106 rearwardly of the lead-in tubesprovides a transition portion 1220 for the optical fibers that aresecured in the fiber optic ferrules 1130. Since the crimp body 1106 hasa singular opening 1222 at the rear end thereof, the optical fibers needto be able to exit that singular opening 1222 in a smooth fashion sothey are not bent beyond their bend radius, thereby damaging or breakingthe optical fibers. The transition portion 1220 provides for thisfunction.

The crimp body 1106 also has a top surface 1230 and the bottom surface1232. The top surface 1230 and the bottom surface 1232 may be configuredwith an area 1234 that complements the central portion 1168 and two lobesections 1170 of the rail receiving portion 1164 above. The area 1234functions as an alignment feature of the rail receiving portion 1164. Asdiscussed more below, the latch component (push-pull mechanism) 1104 canbe better aligned with the rail receiving portion 1164 by using the area1234 on the crimp body 1106.

While the crimp body 1106 is illustrated as a single, unitary body(i.e., molded at one time with one material), it could also be molded astwo pieces and then later the two pieces secured to one another.

The latch component (push-pull mechanism) 1104 is illustrated in moredetail in FIGS. 28-29. The latch component (push-pull mechanism) 1104has a main body 1250, with a front portion 1254, a middle portion 1256,and a rear portion 1258. Generally, the front portion 1254 is where thelatch component 1104 engages the fiber optic connector 1100 and controlsconnections to an adapter and carrier. The middle portion 1256 generallyprovides for latching of latch component (push-pull mechanism) 1104 to acarrier. The rear portion 1258 has a grasping portion 1260 to allow auser to push and pull the latch component (push-pull mechanism) 1104 toengage and disengage the fiber optic connector 1100 (push-pullmechanism) 1104 from the adapter and/or carrier.

When the latch component (push-pull mechanism) 1104 is installed on thehousing 1102, the front portion 1254 has two rails 1262 to engage thestop surface 1166 to push the fiber optic connector 1100. Pushing on thelatch component (push-pull mechanism) 1104 causes the force to betransferred to the rails 1262. There is a space 1264 between the rails1262 to allow for the engagement surface 1174 of the latch 1172 to passtherebetween. The front portion 1254 then, moving rearwardly, has anopening 1268. The opening 1268 receives the release ramp 1176. A frontportion of the opening 1268 has a chamfered surface 1270 to engage thechamfered surface of the release ramp 1176. See also FIGS. 28 and 29.Behind the opening 1268 is a downward extension 1272 to fit within theopening 1192 in the rail receiving portion 1164 and to engage theforward facing surface 1194 when removing the fiber optic connector 1100as discussed below. See also FIG. 24.

The next feature of the latch component (push-pull mechanism) 1104 is inthe middle portion 1256 and is an opening 1274 that receives a part of acarrier for a number of fiber optic connectors 1100. As noted above,sometimes it is beneficial for a number of fiber optic connectors 1100to be linked to one another. This opening 1274 along with anotherembodiment of a carrier 1350 allows for the insertion/removal of thefiber optic connectors 1100 from an adapter 1400. The opening 1274 ispartially formed by a chamfered front surface 1276 and a generally flatrear surface 1278.

The rear portion 1258 of the latch component (push-pull mechanism) 1104has a grasping portion 1260. Finally, a release 1280 is disposed on theside of the latch component (push-pull mechanism) 1104. The release 1280is an opening that provides access to the downward extension 1272 thatfits within the opening 1192. As noted above, the downward extension1272 keeps the latch component (push-pull mechanism) 1104 positionedwith the housing 1102. To disengage the latch component (push-pullmechanism) 1104 from the housing 1102, a pin or other small tool can beinserted into the release 1280 and deflect downward extension 1272upward and out of the opening 1192. The latch component (push-pullmechanism) 1104 can now be moved rearwardly from the housing 1102.

FIG. 30 illustrates the fiber optic connector 1100 fully assembled andready to be used. The major components of the fiber optic connector 1100are labeled and the latch component (push-pull mechanism) 1104 inposition to insert the fiber optic connector 1100 into a carrier 1350and/or an adapter 1400. As can be seen, the latch component (push-pullmechanism) 1104 is fully engaged and the two rails 1262 have engaged thestop surface 1166.

Turning to FIGS. 30, 31, 33, and 36, the fiber optic connector can beinserted into a carrier 1350 (FIGS. 30 and 31) and/or an adapter 1400(FIG. 34). The carrier 1350 provides the user with a convenient way toinsert into and remove 4 fiber optic connectors 1100 (could also havemore or fewer connectors, but usually in groups of two) from an adapter(or other telecommunications structure) rather than one at a time. Itprovides a cost savings time wise and also assists in preventing thestubbing of or breaking fiber optic connectors.

The carrier 1350 has a few features that enable the use of the carrier1350 to correctly orient the fiber optic connectors 1100 (polarity) andalso to align the fiber optic connectors to one another for insertioninto the adapter. The carrier 1350 has a top 1352 and a bottom 1354 andthe top 1352 has a cut out 1356 for each of the fiber optic connectors1100, or the latch component (push-pull mechanism) 1104. Each of the cutouts 1356 has a cantilevered latch 1358 that protrudes into an opening1360 of the carrier 1350. If the fiber optic connector 1100 is insertedinto the carrier 1350 incorrectly (wrong polarity) then the fiber opticconnector 1100 will not seat in the carrier 1350 correctly. Thecombination of the latch 1358 and the bottom 1354 prevent the fiberoptic connectors 1100 from being inserted incorrectly. The cantileveredlatches 1358 have a projection 1362 that extends into the opening 1360(FIG. 32) and, when a fiber optic connector is inserted, rests in theopening 1274. The first surface 1364 of projection 1362 is chamfered andis to engage the chamfered front surface 1276 of the latch component(push-pull mechanism) 1104 during removal of the fiber optic connector1100. The forward facing surface 1368 used to engage a rear surface ofthe housing 1102 when the carrier 1350 is used to insert the fiber opticconnectors 1100 into the adapter 1400. Finally, the rear facing surface1370 used to engage the generally flat rear surface 1278 of opening 1274when the carrier 1350 is used to remove the fiber optic connectors 1100from the adapter 1400.

Installation of the fiber optic connector 1100 into the carrier 1350 isillustrated in FIG. 33. Using the latch component (push-pull mechanism)1104, the fiber optic connector 1100 is inserted into the carrier 1350because the two rails 1262 to engage the stop surface 1166 therebypushing the fiber-optic connector 1100 through the carrier 1350. Therelease ramp 1176 is disclosed in the opening 1268 of the front portion1254. Similarly, the projection 1362 on the latch 1358 is disposed inthe opening 1274 of the latch component (push-pull mechanism) 1104. Thismethod is repeated for each of the fiber optic connectors 1100 that areto be inserted into the carrier 1350.

The fiber optic connectors 1100 can be inserted into the adapter 1400 isillustrated in FIG. 34. As with the prior embodiment, fiber opticconnectors 1100 can be inserted into the adapter 1400 one at a time, orin multiples using the carrier 1350. Once the fiber of the connectorsare aligned with the adapter 1400, a user can grasp the carrier 1350 topush fiber optic connectors 1100 into the opening 1402 of the adapter1400. The forward facing surface 1368 on the projection 1362 engages therear surface the housing 1102 and, more particularly, the rear surfaceof the central portion 1168 of the rail receiving portion 1164. Thatcauses the latch 1172 with an engagement surface 1174 to deflectdownward as it enters into the adapter 1400, and once it reaches thewindow 1404, latch 1172 will return and position itself in the window1404.

The removal of the fiber optic connectors 1100 be explained withreference to FIG. 35. Fiber optic connectors 1100 can be removed fromthe adapter 1400 by using the carrier 1354 or the latch component(push-pull mechanism) 1104. If the user is going to use the latchcomponent (push-pull mechanism) 1104, the user will pull on the graspingportion 1260. This will cause the chamfered surface 1270 to engage therelease ramp 1176. This will cause the latch 1172 to be biased downwardfreeing the engagement surface 1174 from the adapter window 1402.Further pulling on the latch component (push-pull mechanism) 1104 willpull the fiber optic connector 1100 from the adapter 1400 as therearward facing surface 1272 engages surface 1194 in the opening 1192.

If the carrier 1350 is to be used, the carrier 1350 is moved rearwardlyrelative to the latch component (push-pull mechanism) 1104. The rearfacing surface 1370 of the carrier 1350 engages the generally flat rearsurface 1278 of opening 1274, causing the chamfered surface 1270 toengage the release ramp 1176. This releases all of the fiber opticconnectors 1100 from the adapter 1400.

Finally, with reference to FIG. 36, the fiber optic connector 1100 canbe removed from the carrier 1350. While holding the carrier 1350 steady,the user can pull on the latch component (push-pull mechanism) 1104,which causes the chamfered service 1276 in the opening 1274 to engagethe first surface 1364 of projection 1362 of the carrier 1350. This willcause the cantilevered latch 1358 to deflect upward and out-of-the-wayso that the latch component (push-pull mechanism) 1104 can be removedfrom the fiber optic connector.

An alternative spring push 1724 is illustrated in FIG. 37. The springpush 1724 has a pair of detents 1726 that frictionally engage an insidesurface of the housing. This would eliminate the need for any openingsin the housing as there are no latches to be secured. The spring push1724 includes an extension 1728 with opposing sides 1730 that aresemi-circular and provide more support to the springs 122. The extension1728 terminates at two circular surfaces 1732 that engages the end ofthe springs 122. There are openings 1734 in the middle of the circularsurfaces 1732 to receive lead-in tubes, that extend out the back of thespring push 1724. The back end of the spring push 1724 may also have adifferent connection system for a crimp band.

An alternative crimp body 1706 is illustrated in FIG. 38. The crimp body1706 has two projections 1708 and two t-shaped extensions 1710 directedtoward the front thereof. The crimp body 1706 provides the same functionas the crimp bands in the two prior embodiments. While not shown, thetop and bottom surfaces 1712 and 1714 may be configured to assist withthe alignment of a push-pull mechanism. The crimp body 1706 alsoprovides an internal space that allows for a smooth transition of theoptical fibers through the openings 1734 and the lead-in tubes of anyassociated fiber optic connector.

A third embodiment of a fiber optic connector 2100 according to thepresent invention is illustrated in FIGS. 39-49. The fiber opticconnector 2100 is similar to the other embodiments in that the majorityof the parts of the fiber optic connector 2100 are the same, except thatthe latch component (push-pull mechanism) 2104 is a self-returning latchcomponent (push-pull mechanism) 2104. That is, that if the user pullsrearwardly on the latch component (push-pull mechanism) 2104, then thelatch component (push-pull mechanism) 2104 will return to its originalposition (a forward position) without having to be returned manually. Inthe prior embodiments, if the latch component (push-pull mechanism) 104,1104 were to be pulled (to remove the fiber optic connectors from theadapter/carrier, then the latch component (push-pull mechanism) wouldremain in a rearward position. The present embodiment is biased suchthat the latch component (push-pull mechanism) 2104 will automaticallyreturn to the forward position.

Given the similarities between this embodiment of a fiber opticconnector and those discussed above, particularly the first embodiment,only a discussion about the new components will be included. Thus, thediscussion will be about the latch component (push-pull mechanism) 2104and small changes to the housing 2102.

The latch component (push-pull mechanism) 2104 is illustrated in moredetail in FIGS. 40-48. The latch component (push-pull mechanism) 2104has a main body 2210 and a latch body 2212 that attaches to the mainbody 2210. See FIGS. 40-43. The main body 2210 has a front portion 2214,a middle portion 2216, and a rear portion 2218. Generally, the frontportion 2214 is where the latch body 2212 attaches to the main body 2210and provides for the latching of the fiber optic connector 2100 to anadapter and carrier as discussed above. The middle portion 2216 providesan area for the flexure member 2220 and to engage the latch component(push-pull mechanism) 2104. The rear portion 2218 has a grasping portion2222 to allow a user to push and pull the latch component (push-pullmechanism) 2104 to engage and disengage the fiber optic connector 2100from the adapter and/or carrier.

The front portion 2214 is divided into a first front portion 2230 and asecond front portion 2232. The first front portion 2230 has two windows2234 and 2236 and the second front portion 2232 has a window 2238. Thesecond window 2236 of the first front portion 2230 and window 2238 areto receive a latch from the latch body 2212 therethrough. The firstwindow 2234 (and the third window 2238 as well) is to receive a latchpad on the latch body 2212. An underside of the first portion 2214 has agroove 2240 on either side to receive an extended portion of the latchpads 2242,2244 from the latch body 2212 (see FIGS. 43 and 47) to securethe latch body 2212 to the main body 2210. The extended portion of thelatch pads 2242,2244 (and thus the latch body 2212) are able to slidewithin the grooves 2240 to allow for the latching and unlatching thefiber optic connector 2100. The grooves 2240 should extend the length ofthe first portion 2214.

The second front portion 2232 has an upper surface 2246 that is higherthan an upper surface 2248 of the first front portion 2214. This allowsfor the latching of a carrier and an adapter with the same device, asdescribed above for the other embodiments. On the bottom side 2250 ofthe second front portion 2232 are two extensions 2252, 2254 that are acomplementary configuration of a rail receiving portion of the housing2102. See FIG. 41. The latch body 2212 also has the same rail portionconfiguration of two extensions 2256, 2258 on the bottom thereof. Thisallows the main body 2210 and the latch body 2212 to be slidinglyattached to the rail receiving portion of the housing 2102. When thelatch body 2212 is inserted into the first front portion 2230, a frontsurface 2260 of the two extensions 2252, 2254 provides a pushing surfaceby which the main body 2210 can push the latch body 2212 in the railreceiving portion. See also FIG. 44. The front surface 2262 of the twoextensions 2256, 2258 also provides a pushing surface to be used againstthe stop surface 2264 of the housing 2102. See FIGS. 45 and 48. Thisallows for the user to exert a force on the latch component (push-pullmechanism) 2104 which is transferred through the main body 2210 to thelatch body 2212 and to the housing 2102 to insert the fiber opticconnector 2100 into a carrier and/or adapter.

The middle portion 2216 also has a window 2270 to receive a portion ofthe flexure member 2220, which extends from the latch body 2212. Themiddle portion 2216 also has on the bottom side 2250 a cavity or space2272 to receive any other portions of the flexure member 2220 that maybe needed.

Turning to FIGS. 42 and 43, the latch body 2212 has two latches, anadapter latch 2280 and a carrier latch 2282. The latch body 2212 mayonly have one of the latches, depending upon its uses and the needs ofthe user. The adapter latch 2280 extends from a forward portion of thelatch body 2212 and protrudes through window 2236 of the main body 2210.The carrier latch 2282 also extends from the latch body 2212, from arear portion thereof, and protrudes through the window 2238 of the mainbody 2210. As is recognized from FIG. 44, the adapter latch 2280 doesnot rise as high as the carrier latch 2282 as in the other embodimentsas well. The discussion from those embodiments with regard to theposition and the composition of the ends of the latches is adopted forthis embodiment as well.

The latch body 2212 has a connector latch 2290 as well. The connectorlatch 2290 extends forward beyond the front surface 2262 of the twoextensions 2256, 2258 to engage a latch stop 2292 at the stop surface2264. The connector latch 2290 has a downward curling portion 2294 thatprovides a surface to engage the latch stop 2292. The connector latch2290 may also have a latch rib 2296 that connects the curling portion2294 to the remainder of the connector latch 2290. The latch stop 2292may also have a groove 2298 there-in to receive the latch rib 2296. Itis the connector latch 2290 that retains the latch body 2212 with thehousing 2102. As described below in more detail, when the latchcomponent (push-pull mechanism) 2104 is pulled rearwardly, theconnection of the connector latch 2290 with the housing 2102 allows themain body 2210 to move relative to the latch body 2212.

The latch body 2212 also has two latch pads 2242,2244. The latch pads2242,2244 have two functions: first to help retain the latch body 2212in the main body 2210, and second to limit the movement of the latchcomponent (push-pull mechanism) 2104 relative to the housing 2102. Asseen in FIGS. 39, 45, and 48, the first latch pad 2242 is disposedwithin the first window 2234 of the main body 2210. It is evident thatas the main body 2210 is pulled relative to the latch body 2212, thefirst latch pad 2242 will slide relative to the first window 2234 onlyfor certain distance before it engages a portion of the main body 2210.This is true with regard to the second latch pad 2244 as well. Secondlatch pad 2244 is disposed in the second window 2236 along with thecarrier latch 2282. As the main body 2210 is pulled relative to thelatch body 2212, the main body 2210 pushes on the adapter latch 2280(and the carrier latch 2282) in downward out of the window 2236. As themain 2210 body continues in a rearward direction, it will engage thefront end of the second pad 2244, prohibiting any further movement ofthe main body 2210 to the latch body 2212. See FIG. 48.

Turning to FIGS. 42, 43, 46, the flexure member 2220 will now bedescribed. With particular reference to FIGS. 42 and 43, the flexuremember 2220 extends from the rear portion of the latch body 2212. In theembodiment illustrated in the figures, the flexure member 2220 has afirst curved portion 2300 and a second curved portion 2302. Secondcurved portion 2302 terminates at terminal end 2304. The terminal end2304 is preferably disposed with in the third window 2270 and alsopreferably makes contact with at least one of the surfaces that definewindow 2270. See FIG. 46. The first curve portion 2300 also partiallyresides in the cavity or space 2272. It is also possible that theflexure member 2220 only has one of the two curved portions 2300,2302,depending upon the amount of force required to main body 2210 relativeto the latch body 2212.

As the main body 2210 is pulled rearwardly relative to the latch body2212, the latches 2280, 2282 are moved downward (as also describedabove) releasing the fiber optic connector 2100 from any adapter and/orcarrier. During this movement, the flexure member 2220 is put undertension (the curved portions begin to straighten out or alter from theshape in their state) as the terminal end 2304 presses against the wallof opening 2270. Once the fiber optic connector 2100 is free from theadapter and/or carrier and the user releases the grasping portion 2222,the main body 2210 will return to its original state as the flexuremember pulls on the main body 2210. See FIG. 39. The flexure member 2220acts as a self-return mechanism for the latch component (push-pullmechanism) 2104. Accordingly, there are other self-returning mechanismsthat may be used instead of the particular embodiment of the flexuremember 2220. For example, a spring could be used to bias the main body2210 relative to the latch body 2212.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the present inventionwithout departing from the spirit and scope of the invention. Thus it isintended that the present invention cover the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

What is claimed:
 1. A fiber optic connector comprising: a housing havinga main body extending between a front end and a rear end and having anopening extending therebetween; two ferrule assemblies disposed withinthe opening of the housing, each of the ferrule assemblies comprising afiber optic ferrule, a ferrule holder, the fiber optic ferrule beinginserted into a front end of the ferrule holder and extending away fromthe front end of the ferrule holder; two springs, each spring engaging arearward facing surface of a respective ferrule holder and extendingtowards the rear end of the housing to bias the ferrule assembliestoward the front end of the housing and retained within the housing; anda crimp body having a rail receiving portion extending along a firstsurface to receive a portion of a latch component and aligned with arail receiving portion of the housing.
 2. The fiber optic connectoraccording to claim 1, further comprising a spring push engaging a rearportion of each of the two springs.
 3. The fiber optic connectoraccording to claim 1, wherein the rail receiving portion extends alongat least a portion of the housing.
 4. The fiber optic connectoraccording to claim 1, further comprising: a crimp band secured around anouter surface of a rear end of the crimp body; and a strain relief bootattached to the crimp body and crimp band and extending rearwardly awayfrom the housing.
 5. The fiber optic connector according to claim 1,further comprising an indicia of polarity on the housing.
 6. The fiberoptic connector according to claim 1, wherein the rail receiving portionhas a dove tail configuration or an undercut configuration.
 7. The fiberoptic connector according to claim 1, wherein the latch component is apush-pull mechanism.
 8. The fiber optic connector according to claim 7,wherein the push-pull mechanism includes a latch for a carrier and alatch for a fiber optic connector adapter.
 9. A housing for a fiberoptic connector, comprising: a main body extending between a front endand a rear end and having an opening extending therebetween to receive aferrule assembly and a spring; a forward facing surface to engage a rearend of the spring to forward bias the ferrule assembly inside theopening; a rail receiving portion extending along at least a portion ofthe housing and having a stop surface adjacent the front end to slidablyreceive a latch component; at least two longitudinal portions on a topsurface and a bottom surface of the housing to align the housing with anadapter; and a crimp body attached to the rear end of the housing andhaving a transition area for optical fibers received in the housing. 10.The housing according to claim 9, further comprising a structure insidethe opening to prevent a rotation of the ferrule assembly.
 11. Thehousing according to claim 10, wherein the structure is a flat surfaceto engage a corresponding flat surface of a ferrule holder of theferrule assembly.
 12. The housing according to claim 9, the crimp bodyhaving a rail receiving portion extending along a first surface toreceive a portion of a latch component and aligned with a rail receivingportion of the housing.
 13. The fiber optic connector according to claim9, further comprising an indicia of polarity on the housing.
 14. Thefiber optic connector according to claim 9, further comprising: a crimpband secured around an outer surface of a rear end of the crimp body;and a strain relief boot attached to the crimp body and the crimp bandand extending rearwardly away from the housing.
 15. A fiber opticconnector comprising: a housing having a main body extending between afront end and a rear end and having an opening extending therebetween,and a rail receiving portion extending along a portion of the housing;two ferrule assemblies disposed within the opening of the housing, eachof the ferrule assemblies comprising a fiber optic ferrule, a ferruleholder, the fiber optic ferrule being inserted into a front end of theferrule holder and extending away from the front end of the ferruleholder; two springs, each spring engaging a rearward facing surface of arespective ferrule holder and extending towards the rear end of thehousing to bias the ferrule assemblies toward the front end of thehousing and retained within the housing; and a crimp body having a railreceiving portion extending along a first surface to receive a portionof a latch component and aligned with the rail receiving portion of thehousing.